Can I install IE10 Preview for Windows 7 and keep the previous IE8 version for development testing?
5 Answers
I don't believe you will be able to run IE8 and IE10 side-by-side on the same machine. Instead, I would encourage you to use the browser-emulation options found within the F12 Developer Tools. From there you can instruct IE10 to behave as though it were IE8.
If emulation isn't desirable, and you're not interested in downloading a virtual machine image, you could also consider exploring the BrowserStack service. It will allow you to spin up IE8 on multiple versions of Windows, and view both remote and local files.

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2Great resources - I've known about the emulation capabilities via **F12** and also **VM images** - but I've not seen the VMs on-demand that support native interaction with different platforms and browsers. I can see real use for **browserstack**. – SliverNinja - MSFT Nov 19 '12 at 16:36
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2The question I have is, how close does emulated IE8 match the actual functionality of native IE8? Are there known differences or bugs in one that aren't in the other? – JD Smith Mar 13 '13 at 17:47
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1@JDSmith There are indeed some differences that I've ran into, though I have not cataloged them. – Sampson Mar 13 '13 at 23:39
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1fair warning, F12 Emulator options don't properly emulate the browser versions. – JoeBrockhaus Dec 13 '13 at 16:57
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2@JoeBrockhaus They don't *fully* emulate other browser versions. Meaning, there isn't a perfect representation of IE8 within IE11. That being said, there are a lot of things IE11 *properly* emulates about IE8. – Sampson Dec 13 '13 at 18:05
I think this is a more reliable option for developers
it contains
- Internet Explorer 1.0 (4.40.308)
- Internet Explorer 1.5 (0.1.0.10)
- Internet Explorer 2.01 (2.01.046)
- Internet Explorer 3.0 (3.0.1152)
- Internet Explorer 3.01 (3.01.2723)
- Internet Explorer 3.03 (3.03.2925)
- Internet Explorer 4.01 (4.72.3110.0)
- Internet Explorer 5.01 (5.00.3314.2100)
- Internet Explorer 5.5 (5.51.4807.2300)
- Internet Explorer 6.0 (6.00.2800.1106)
- Internet Explorer 6.0 (6.00.2900.2180)
- Internet Explorer 7.0 (7.00.5730.13)
- Internet Explorer 8.0 (8.00.6001.18702)

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Once you've upgraded to IE10 it doesn't let you install IE7/IE8, IE6 is as high as you can go. – GordonBy Oct 18 '13 at 14:23
Also consider IETester - http://my-debugbar.com/wiki/IETester/HomePage
You can run tabs side by side in different browser versions. Works well for my web dev testing.

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MS started an extra Homepage for IE testing. Lots of options under http://loc.modern.ie/

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1this is the best answer imo. VM's available for proper testing of all browsers. – Pure Function Jun 12 '14 at 03:05
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Depends on your Hardware and VM. Quite fast here with VM-Ware Workstation and 16GB Ram. – Andreas Rathmayr Oct 22 '14 at 07:36
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You may consider VMware thinApp (virtualize Application) or Microsoft RemoteApp (Run application from remote server).
In my environment, I have amix of thinApp and RemoteApp (some application virtualized (ThinApp) and then accessed using RemoteApp).

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